Americans don't exactly have much faith in their government right now, so excuse me for suggesting that we need to introduce more taxes. But if you consider the enormous benefits that extend from taxing some of society's negative externalities -- the unintended consequences of providing a good or service -- it's much easier to swallow. Several new taxes could close the budget deficit, provide a windfall into future technology research, lower national health-care costs (for everyone), encourage business investment, or simply reduce your household's annual tax burden.

Don't think it will work? There is a pile of evidence showing that tobacco taxes have, in fact, curtailed smoking rates in the past several decades. New York state, which tacks on the highest taxes per pack in the nation, has seen smoking prevalence drop 20% in the decade since 2003-2004. Ironically, tobacco companies are among the best-performing stocks in the past 10 years. I think that bodes well for instituting additional taxes on even bigger negative externalities plaguing our nation.

Carbon tax
I wrote a lengthy article earlier this year detailing the benefits of a national carbon tax. Study after study has called on policymakers to entertain the economic and environmental gains that could come from taxing carbon emissions, one of which from MIT went as far to call it a "win-win-win" proposition. Enacting a tax of $20 for every ton of emitted carbon that rises 4% annually would raise $111 billion in additional tax revenue in 2015 and $337 billion in 2050 (in 2012 dollars). That is some serious coin for Uncle Sam, but what does it mean for the energy industry and consumers?  

Some see an environmental time-bomb with carbon emissions, while others see massive revenue potential. Source: Wikimedia Commons.

Such a tax would act as the ultimate motivation for power generation companies and dirty industrial processes to invest in cleaner, perhaps renewable technologies. Consider that the production tax credit -- a relatively modest subsidy aiding renewable power sources gain market share -- allowed companies such as NextEra (NEE 0.96%) to boost American wind generation from just 6 billion kilowatt hours (kWh) in 2000 to 140 billion kWh in 2012. NextEra now has more than 10,000 megawatts (MW) of wind capacity, which makes up 55% of its total portfolio. Imagine what a carbon tax would force the industry to do. 

Perhaps residential solar power would become much more common, thus reducing your energy bills. Technological hurdles stunted solar's rise in the past decade as wind soared to the top, but the gap may be closing. A new report released this week showed that the United States added a record 723 MW of solar capacity in the first quarter. Residential solar added 164 MW and grew 53% year over year -- the largest growth of any segment. Market forces are certainly pointing to a bright future for SunPower (SPWR -2.21%) and SolarCity (SCTY.DL), which could really take off if a carbon tax became law.

Where would all of this revenue go? It could pay consumers to offset any increase in energy bills, fund future energy investments such as next-generation nuclear reactors, or help close the budget deficit. Consumers win (economically), future generations win (health), and the only planet we have wins (environmentally). I'd call that a pretty successful tax.

Sugar tax
Austerity and public health concerns have made taxes on sugar, salts, and energy-drink ingredients realities in Denmark, Hungary, and France. Researchers have had a difficult time modeling how taxing sugar would reduce obesity rates, if at all. But if similarities can be drawn between taxing tobacco products and unhealthy foods/ingredients, policymakers have reasons to entertain the idea.  

This soda serving could cost you a couple of extra cents before the end of the decade. Source: Wikimedia Commons.

Why tax sugar? Let's begin by saying that obesity is a very complex issue that is linked to physical activity, diet, genetics, and biochemical responses to your environment, or epigenetics. Although diet fails to account for all cases of obesity, reducing the consumption of unhealthy foods could save billions in health-0care costs each year.

At last count nearly 36% of adults and 17% of children and adolescents in the United States were obese, according to figures released by the Center for Disease Control. That's up markedly from rates just 10 and 20 years ago. The belt-busting trend cost Americans an estimated $190 billion in health care costs in 2011 alone. Therefore, every 1% drop in obesity prevalence that results from a sugar tax would save Americans close to $2 billion in annual health-care costs. What do we have to lose?

In addition, if the performance of the tobacco industry is any gauge, then soft-drink producers such as Coca-Cola (NYSE: KO) and PepsiCo (NYSE: PEP) have little to fear. It's a bit more complicated than tobacco taxes, however. Blaming increased risk of lung cancer on smoking is much more of a slam-dunk than putting all of the blame of rising obesity rates on sugary drinks alone. So it is easy to see why the two companies and the American Beverage Association spent $70 million on lobbying and advertising from 2009 to 2012 to stamp out proposed sugar taxes in 30 states. Still, I think it's only a matter of time before a state sugar tax successfully passes.  

Foolish bottom line
It won't be easy for these two taxes to become law, but the long-term benefits certainly outweigh the risk of spending more on energy or soft drinks in the short term. They could generate hundreds of billions of dollars in additional tax revenue in their first few years that could be put toward any combination of projects. Better yet, they don't require the tough decisions that have tripped up Congress in recent years. While critics point to the mayhem that increased taxes will create on the industries they affect the most, the performance of the tobacco industry over the past decade shows that taxing negative externalities isn't a death sentence. In fact, the opposite has proved true.